Hydrocruiser

Hey Donziman if Merc is using Amsoil Racing/Severe Service 20w50 2000 series in their 1050's that speaks volumes about the weight and brand and their take on synthetics in high HP blown engines! I have 350 Magnum small blocks and use Amsoil 15w40 and don't think in my application that I have the requirement for a 20w/50 weight.

If synthetics didn't provide a better film coating that lasts and that protects on "dry" starts better and is totally free of sulphur to prevent the potential for acid formation in a marine environment from condensation issues, I would save the money for beer and use a 30wt conventional on sale at Murrays for .99/qt in a heart beat.

formula31

So Hydro, are you or any of your interests getting any money or other considerations from Amsoil? Oh and by the way, the synthetic moelcules are bigger than their dyno counterparts so they dont flow as well though the same filter. Sounds very much like marketing to me.

formula31

You should probably be moved to the classifieds.

Hydrocruiser

Nope. I like the variety of oils Amsoil has and what Donziman heard about Merc using it in their 1050's. I said Sterling uses Mobil-1 and Cobra RP. With Mobil-1 you have to use the 15w50 or motorcycle to get an oil from Grade 1 stocks. Amsoil is all from Grade 1. I personally don't use RP because it has Moly in it which is a powder like graphite and a lot of manufacturers say not to use oils with a powder additive.

Hydrocruiser

Why don't YOU enlighten us? Start by telling us why we ought use a straight 30 or 40 when Merc now says use a multi conventional. Then explain why according to Donziman Merc uses Amsoil in their 1050's and then why Sterling and Cobra use synthetics along with Volvo Penta and go from there. 30 and 40 weights obviously work and if you like them go for it but don't be saying I sell the stuff. Geez. Mobil1 oil filters also take molecular size into consideration as does Baldwin and Amsoil for synthetics they all trap and flow well. I am sure there are others. Use what you like I am not trying to sway you or anyone for that matter.

Hydrocruiser

I was at Walmart and saw they have Mobil-1 15w40 in 5 qt containers now in our location. $ 19.46 = $ 3.89/qt. It's from grade 1 stock. Looks good to me!

mr_velocity

You mean 5qt containers, just bought 6 on Saturday night.

Hydrocruiser

I mentioned in a different thread I guess that Walmart now sells a 5 gallon container of Mobil-1 and it is marked as such. It goes for $ 19.84 or $ 3.96/qt. I checked with the Mobil "hotline" and their Mobil-1 filter is designed to flow well with a synthetic and trap below 10 microns.

Amsoil makes a marine 15w40 with extra corrosion additives.

The 20w50 series 2000 racing is a product for severe service but not exclusively so.

Amsoil filters also filter down past the 10 micron level.

My main reason for going synthetic is that fact that there is no sulfur in them and conventional oils do have various amounts of sulfur that in combination with heat and moisture will form acid. The second reason in better and longer lasting film strength.

The Walmart deal on Mobil-1 is a savings of $ 10.00/change from where I bought it from last season where it was selling for $ 5.99/qt. Plus the 5 gal container is nice for capturing the spent oil.

I would never try to make a case that one synthetic from Grade-1 is better than another. AT $ 3.96/qt at Walmarts maybe more will try it and benefit?

formula31

If I had 1000 hp engines you bet I'd be using synthetic. Merc's recommendation to use their 25-40, which, by the way, is NOT a conventional multiviscosity but a mixture of straight 25 wt and 40 wt, is probably a marketing ploy. They want to sell oil, and enough people werent listening to their oil recommendations regarding temperatures so they made this stuff. Im using mobil 15-50 on one engine, and straight 30 on the other, (both identical and fresh) quess which one has higher pressure and lower temps.

Downtown42

Me too.